{
  "manageEntity": {
    "action": "Save",
    "entityId": "1498502247",
    "entityType": "Track",
    "nonce": "0x5a88082cf949220b39708fb0e5701c0517e9e63b2478bf677b762a6aa8326aee",
    "signature": "0x47ba46da3e7d255db12ac6cf3237c05cede4ee7c955005ea4e87e788ba7cf9cc467d1034de0250124efd7b914fb1f6ad299bbb66f030fc11ba3fe5c8ef85b5c41c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}