{
  "manageEntity": {
    "action": "Save",
    "entityId": "61644",
    "entityType": "Track",
    "nonce": "0xb83946e1e292b210a85db699315ba32ff6855a1e3f8d39527eb0e095abde9f8f",
    "signature": "0xc98b90cf9b65c39c427bca0dd1bb5bd642464f726563946566c0be7d46142b080398f1eab4404e6bbf59396bd5b5bbe67062ec067c177618bb9d57fdfb953d1a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}