{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216404924",
    "entityType": "Track",
    "nonce": "0xd0aa517c3fbbae7cbd3d399385a8d0133b7c545317c974fc222a91349b37348c",
    "signature": "0xedc2e3cfb0ff5a4fe7020fcd646911eae27376ed0c8899daaa05ee61a92109e329847d4555c9f11f6238ffbe8965098c9be725e947acf54e81f464cc355e4e3d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}