{
  "manageEntity": {
    "action": "Save",
    "entityId": "274685617",
    "entityType": "Track",
    "nonce": "0x4172e6bb41b56b7fbafc3a3db6d2d634ddeddde1c38d593a5f1a210ffc80e21e",
    "signature": "0x9b346a371640a88e9fa0f79d4e063636946fac8e13caaff6f77616134c0382ba5be7dd43469ee3003e1726a01e2bc17747f949118eb9b20462676233dbca52041c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}