{
  "manageEntity": {
    "action": "Save",
    "entityId": "1072854",
    "entityType": "Track",
    "nonce": "0x1ebe4bc6a9190e3a78425fa686935d3e820cd957d1907229e5759e371d7643fc",
    "signature": "0x837af5cbf758c330038793fa4ec6de9eb16ce0a9db7b3535058ef3c26a44912c1068d87e93701c056039c12ade560d35c2ff089f1c51b90d1647abf6c70515801b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}