{
  "manageEntity": {
    "action": "Save",
    "entityId": "1393927340",
    "entityType": "Track",
    "nonce": "0xba0e4f646226a63f79513b553f3f9bd8175ecb6ce4a0a4a0c3b8470805495782",
    "signature": "0xbbbcf90487ee1c3c209e40973f2f458e49a4bb7aa2977df27a9b9d155ab1164c3a8ef8119c81f5e32e2b1010343cbe75fb07931495d779c30f1250b0c80318f41c",
    "signer": "0xc350d890DCc6382B84906765c352e34689f1F38f",
    "userId": "326760792"
  }
}