{
  "manageEntity": {
    "action": "Save",
    "entityId": "1138063525",
    "entityType": "Track",
    "nonce": "0xec2330dcdefc5b87a27870c224303377d82c80cd14105dc996a6849bb95b26a7",
    "signature": "0x124c690c294b4fc25c9f2ae3b076577497669d8d062eeeae1a8532745c01d53f60165767e1ae085879fc838b5b523633ef8ae42b29ca4948096d847c235a7df51b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}