{
  "manageEntity": {
    "action": "Save",
    "entityId": "352725689",
    "entityType": "Track",
    "nonce": "0x578783fdc0543db404f862cddc6cabd1fbc383af20bb2fb851bc33ad930cc17b",
    "signature": "0xacf410035569a086bf232cbca821c302a494ca6f5ed7d7622cf126dc2fc1000958018a65d924e870ba3661591c59c6cbc84b68327bc6834d9744a3a719c777af1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}