{
  "manageEntity": {
    "action": "Save",
    "entityId": "243055337",
    "entityType": "Track",
    "nonce": "0x356b2a32378f8dbf7124d33994364951779b7261d2eb55ed8a1ba7d8888fd072",
    "signature": "0x9e92f4c5982078e90af259ebc327926ba60fe8e5461ebba5cc7d84d76652d003640e0f6dd0ed78bb49a6828a9d299122b8bc071e2c6e27cb6e66e555738db2081c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}