{
  "manageEntity": {
    "action": "Save",
    "entityId": "1646969090",
    "entityType": "Track",
    "nonce": "0xb94f9437cbf5ad1208d5d8ffd8add984f8939cc60ca4234444a689997f5a11f9",
    "signature": "0xde814b437cb6c3112e85844a63fcc2f26a365f0f9a6f6d03c1ceba1299d392d6575db1290d7ba457229bef32a4e42c1a33edb66f8c6e3cab49918e813745856b1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}