{
  "manageEntity": {
    "action": "Save",
    "entityId": "29008398",
    "entityType": "Track",
    "nonce": "0x56d6e830e76e57b5b94233e6aa473211d3e2db66401ca07d6cc340d641784a15",
    "signature": "0xbd944dbe262c1af3e0cb3f1dfa4300f638a1454d6559ec33b43604059aca69a44a61c89519a1dbdd8ebf95e8db96f07dd0ac25344c96daf8037cb0d993f10f791b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}