{
  "manageEntity": {
    "action": "Save",
    "entityId": "231331",
    "entityType": "Track",
    "nonce": "0x41e407a84a6bf966be10e534eb35512f71c77976e1be9b182b57333f78d17115",
    "signature": "0xcd4e430eebe120c6719ffa6080cea1156fc80138b2c0da28c9571e9c1a15ac91209da12eef96d8a71f678903261679954a068e7041545847a4a3cf37416d41951c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}