{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015984",
    "entityType": "Track",
    "nonce": "0xef3bbc16903b58c42acddb6a9a3b75bf26a4cdb006f1a817edd19833a643f946",
    "signature": "0x0ff11bcb5b63bfd810a63064043d2c436f1d92a985204fff1079866c5e79f7b64bcc086ca7b8b040aa7550b714cb11c9a6bae545332340d6b7a7c0ff43ac11a31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}