{
  "manageEntity": {
    "action": "Save",
    "entityId": "177195078",
    "entityType": "Track",
    "nonce": "0x49abac6379723d08983a328eb26f0db1c890384b86666f1d5f2c399f1988789f",
    "signature": "0xe2d53c2b50a35b5e1ce42e9b7ef4e563cd94c6428f1e6d04bdaf6ef58c9bab774201844615aa632e34a182006e8682c96565ca316df97504fbaba4e36f7322861c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}