{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125427239",
    "entityType": "Track",
    "nonce": "0x1ce270c6fe1ce976343d3f4f01fe10429250f9cd53699a85cbfb48a27d0f2c17",
    "signature": "0x68089356b6e785e92e2a142d81f283ae1b8e8f81db5f86baaca180a337353f1a0917ca8759d374faa50d026c886844faf105cc544a8a86a22fb9b59d19d6cdd61b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}