{
  "manageEntity": {
    "action": "Save",
    "entityId": "997568212",
    "entityType": "Track",
    "nonce": "0x3df75c90228d579482fa7142ba98e51d7a904d42c62e8e5949014461d4a4e277",
    "signature": "0x047e9bc4fa4391149d3a36114b5987088ac9cbe038f5e98a93ac30c7a8e35d3248c4592bbf4097ae7fcf8d270e648c2efffee5f665e7b91a2581c7ce6cf1e8581b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}