{
  "manageEntity": {
    "action": "Save",
    "entityId": "675241751",
    "entityType": "Track",
    "nonce": "0x29e8ba8f91c2a1d442ba6103a006798ae079ed0eaaecc257b19e273243d62a04",
    "signature": "0xfdabc893f1f99cd17e02055025f0f5d582c7b5dbd56b3dde9900e71d21098d0a021e5bc76e5431bb4ffb366f972b7025ea320ca7f6f0bd965e917d08b7937ae11b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}