{
  "manageEntity": {
    "action": "Save",
    "entityId": "420927904",
    "entityType": "Track",
    "nonce": "0x0e97f3cc3f2760dbaa85649182f94b8bcfb0ea8f6ade41c87eb4ed4771ea8c9c",
    "signature": "0x5673f362e317fb85f3bdd5dd7433feb23252a6c2cc519ff163dd7168bf5f40f912ed697adeadb9c46701086d089068f992b771f44fb80e80c6357672d0a81a2b1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}