{
  "manageEntity": {
    "action": "Save",
    "entityId": "434769428",
    "entityType": "Track",
    "nonce": "0x501bddd7132262b8d7a32440ccfd7e643eeadd2358cf0590a95a5c7993097d79",
    "signature": "0x93112d33c7013f806c33bae56b58722cfef58ce4966f410b93125eb9c8b153596689fecb5205bd38eddd2f7d2b94b25624a9fe515bfac667de843e7185aba4fa1b",
    "signer": "0x69F109EC41448B316AeBBD9F0b2B445c09552bF8",
    "userId": "184573"
  }
}