{
  "manageEntity": {
    "action": "Save",
    "entityId": "1923798335",
    "entityType": "Track",
    "nonce": "0x2186aafccf31fbf20142865fd5f3a0dc207be8926fc23c08017e05823a8ccc62",
    "signature": "0x999be144279db6ae7f8858cbcbab50403498e316e638c7063dd7850a735a0b685e80122e6476d50d6529dd9dbd3175b797303f0e975eee53b27d654535b3d57b1b",
    "signer": "0xa87a47d29d9bF83871B0Fe2D0F5E775195040409",
    "userId": "984621213"
  }
}