{
  "manageEntity": {
    "action": "Save",
    "entityId": "1966487399",
    "entityType": "Track",
    "nonce": "0xbe3b389c1357d61c796ac423e7e6e648897e3509256c24746c4f4300ee51ce0b",
    "signature": "0xfce3f3fd5b431ea2eb599bd612016143e73086b4fd8f06e3a13cb2c433976d1368aab7b41e47ac180a01417612705c79e762ab69e4fb5ebc1b1ea57d540e1b211c",
    "signer": "0xCedE64dcD8b0FdEDBdADF4b0ba433797eD6301c9",
    "userId": "638733607"
  }
}