{
  "manageEntity": {
    "action": "Save",
    "entityId": "334691100",
    "entityType": "Track",
    "nonce": "0x39c232ea2f20c6649500921fc54ce50f63f02544bead3c77a6fe5c285dff3649",
    "signature": "0x8ea30405abbc728bc6e4daf48622d9aae354328fef9b163d42046fd93c66b3ce5182a0043801160cb4cff41fc34068fe67286cdf355a3ef3db75bd48471702f21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}