{
  "manageEntity": {
    "action": "Save",
    "entityId": "231122912",
    "entityType": "Track",
    "nonce": "0x89c62b6bc4cb81dd5518a09c5a63868ab64c131c562816935fd08bd14cd7042c",
    "signature": "0x054b061ae4f659f8e0de6ff39a2d0cacac337cd48c6556bd698d173b78fe49961f97dfdf614309c91d08414820b0647ca24ccd3795fbd3fd662124983a07e98f1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}