{
  "manageEntity": {
    "action": "Save",
    "entityId": "1156993580",
    "entityType": "Track",
    "nonce": "0x70bc7a3686fdcb2bd17eb790614a0f8686eafd9ac66e5ac066ff03031a0f5e67",
    "signature": "0x87393fa2eebcd617856b814c6c4e250ac4300886d4d2e5d51574cf8b25b798b30cda61e6445981ed4db4fba9facc7368cd54caee57dde8f9cdc2b25beacaae521b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}