{
  "manageEntity": {
    "action": "Save",
    "entityId": "1764339723",
    "entityType": "Track",
    "nonce": "0x60bb403de6c167c3b3e62e14d7b83abac71a311bfad55568bdd3a2bab9dd2254",
    "signature": "0x523f711331074f43cbc4ba6ade06fccf1464c268f076a28ebf48f9527b016adf6ff0fa991a60fb9897c143d49eef2c4bf4a298bcf81b9b65ce4a422676e21ddb1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}