{
  "manageEntity": {
    "action": "Save",
    "entityId": "1778519019",
    "entityType": "Track",
    "nonce": "0x6a237f07cfc61c1cb675352e9025d55488ca7e682b9178e30f57dd46ec46c11a",
    "signature": "0x902b6313bf2716a1a39b5b626a80b058ae0d0a0eb4e477ae7fabfd40af2da3d93861ae83e09ac74c609e8710405a5ebaaba766b7d701321914892017648d350e1b",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}