{
  "manageEntity": {
    "action": "Save",
    "entityId": "805600328",
    "entityType": "Track",
    "nonce": "0x5058e2750a5360a6051639734fc2eebc2eb0232624a955596e1ad76aed440169",
    "signature": "0xa8bbcf3e3e61b3400260514a6ebea4c29c983f9fc7505610928adbc19a3968765ce782387d442fa7d330055f9081878cfa824b1987da280727545e2e6ce7177b1b",
    "signer": "0x03d3f4F23bc0B2806CE947E23114FE8Dbc6c36bC",
    "userId": "311554913"
  }
}