{
  "manageEntity": {
    "action": "Save",
    "entityId": "1619007172",
    "entityType": "Track",
    "nonce": "0x9c56d82f5a43c6f6729ac3c37aec8a0bf2acc176093beda37c6de9533ca638d0",
    "signature": "0xcbd165325bb87f324afe521d38111daf2f7c81923e5d37137e3d2fff2e4975fa0a7cd112e540345bded864702b4890126c935efa001d736647310b09113b02fc1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}