{
  "manageEntity": {
    "action": "Save",
    "entityId": "1253314229",
    "entityType": "Track",
    "nonce": "0xd374831922719e1189e27df6a0ffa5d396ec86bbfb7f50b46d1b769dff508cf8",
    "signature": "0x598ad9aebe2f1fa821c4594090be8f439024d1259608bbb2665f584e2c2b36eb39f92149288a40cafb97862c224162565e1c319c93f55131830526be33a315d81b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}