{
  "manageEntity": {
    "action": "Save",
    "entityId": "891375947",
    "entityType": "Track",
    "nonce": "0xe6a6141a8c9c3894d0b04bf4b3b9905850d6def056b52d56fd4bb1ea5d309dde",
    "signature": "0xedc4489f7dec4f8e08aafeadb07b468e9fbd0fb9b25ed2dedfef31efff9276fe482427b53fe4345d588532843d9cc32a064eb340191cf5ab87b4f5268da0a2961c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}