{
  "manageEntity": {
    "action": "Save",
    "entityId": "1624056747",
    "entityType": "Track",
    "nonce": "0xf683105f8c0df698def5a541d42ced4be655020565bb3e60b1e513f855b9b60a",
    "signature": "0xfaa4f35693c789fadf8b8a0039574766f8f2fa7bc51ebcca6ec23cea06212d5c422ba01434cbcf26e7776129cff38cbccd17088f0fe51af6897d46b8b9ca82b71c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}