{
  "manageEntity": {
    "action": "Save",
    "entityId": "349938",
    "entityType": "Track",
    "nonce": "0x5209461a144b7081a1bfa96e4b4780b30100a68622da95abf47cb14149c30d85",
    "signature": "0x825eda37a93df5f07cfbecd2dd8cd0efe587c5b9fbb6e2bc06e6a97d47f18e755b7f7c8bd5d6e05ff2efb4bd615d7363377af49459a3a267489fec12a80c7b4f1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}