{
  "manageEntity": {
    "action": "Save",
    "entityId": "131906350",
    "entityType": "Track",
    "nonce": "0xa13bfdb9852d736f90f6d0bb62f8d33dda4ed5f762e14df9dc5068f0404b65b8",
    "signature": "0x00b45258343e1eb560a86ae7e8e62c615a57c48576e4c27739f5c331cb352c7732d9b6020717137a338a68114cb9a2512e46c4efbfb0b241adf8c3aabef108341b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}