{
  "manageEntity": {
    "action": "Save",
    "entityId": "737820543",
    "entityType": "Track",
    "nonce": "0x75a02542acc03ec2ca8ced67b644a994d880410fce519e3c265eba31bb7d73ef",
    "signature": "0x6c06c8f8e495a4b683fdfddd8cc9ca5816eb6ccaaaed85bf141e836a3921495d3c37bd12adc1892c32491053a94a7fd033c6998af9b80c805d075892d35307c81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}