{
  "manageEntity": {
    "action": "Save",
    "entityId": "183024",
    "entityType": "Track",
    "nonce": "0xc0e3a42081c24987426257fa7b08d2ccedda109df005d79c26912734cc72ab60",
    "signature": "0x02a1507cf9a8bc4e107e67b0576ccbb8af22f5939cff46828ca8c437de5c019e76862c6fb76f312dfdcaebd2ca7bcd17c5f3a5eb67c0782d5e1922687e06a69f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}