{
  "manageEntity": {
    "action": "Save",
    "entityId": "523481846",
    "entityType": "Track",
    "nonce": "0xff5fe33c73f595ca31fbd5eff260ff13cee8e075d40b0f4c2af8104fe43c1c11",
    "signature": "0x8d853568378966810dafdc67535a912b40d62e5c24fd04226b52eb8970bfe0f026eacc2fa9fb99e28fb30183bb9357c61e1b1c4d2fd9786889e1518c26363b1d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}