{
  "manageEntity": {
    "action": "Save",
    "entityId": "2135389032",
    "entityType": "Track",
    "nonce": "0x23348a5f7032d2a45967ac4cee798e9b02b66aec7268b77d74a28e229d211fbf",
    "signature": "0x1ed4f9318ed7df1e5e1ad10a8c9214139c2bbacb6d40aef33c65aef65265fe856a0cc9f508d3964fa19217db5c1df758238607ac6634d56c11f9b18bb2d664af1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}