{
  "manageEntity": {
    "action": "Save",
    "entityId": "743402324",
    "entityType": "Track",
    "nonce": "0xc84b76d042f39baa91319c485168f3834187b6b936ed9c0bade5320e00cc7a29",
    "signature": "0x2dac446bd567069cee3aa38241cc917d8f856a21df3377d92e8305c8f7f2bd502578edfa23f5fc16e76727d6c1035fe36176c324c4b4f84505f4e1a0be2c499d1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}