{
  "manageEntity": {
    "action": "Save",
    "entityId": "51347",
    "entityType": "Track",
    "nonce": "0xa2c6625ad07da18c848d42fea1d893ece3e038714cb78cd9e32e8b4968f1f116",
    "signature": "0xa1d6c90ac9524defc6b06108cf82f29b5ef2cbfa37d5183a23572d4657d06b821b1b7c3f8ad9f3640e266d2f5b7479b527445e157e888a8e99c176333990f1df1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}