{
  "manageEntity": {
    "action": "Save",
    "entityId": "284249",
    "entityType": "Track",
    "nonce": "0x8c6837d25490007917833168e74a8dbf97854a49f3c167a4eb132d1c583ad0be",
    "signature": "0x8754ce3cac58a33827b86b2bd6b418fcf853b4f1f0fc9c3cfb4755b6d265c97340e9096a446a94e40c2c6fa061fd69d5d50cbed5d0f4843be042154d53f515591c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}