{
  "manageEntity": {
    "action": "Save",
    "entityId": "351955063",
    "entityType": "Track",
    "nonce": "0x497fed9463d78207899722c760ebb34e99670a036a8d99dc37b948c3e7976ec7",
    "signature": "0x1cbee61361ca3d4384a9a2273d57f0e82ab1f72e221eb4581667c359cd799b896a0d033a98ee6aeccb64aab926ee300ff22b23ce6f621010f15ee623b06310491c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}