{
  "manageEntity": {
    "action": "Save",
    "entityId": "593772880",
    "entityType": "Track",
    "nonce": "0xe1fd9be2f46eb2dc31e97e0cb0c368e08e98f01670c085b3b49ad168634136b5",
    "signature": "0x5624f86607919f2399e3c68a3e4e08adc57f41b584f2d75fa422e565634193fd6b1764efb1d940f45d604eb64cfd7c6d82f4da2f47a7d1e26f9595f67d2790a01c",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}