{
  "manageEntity": {
    "action": "Save",
    "entityId": "566047154",
    "entityType": "Track",
    "nonce": "0x2b4921611c22b5d5b3daf75b8f84a0697c4e82b7a291a00ef0dca06233a15694",
    "signature": "0x6eb2372bd77052f8f2a124d15de1d602b6c88b0e500b548f12bee22910e2695526bb4f18e46ebf62962df8cd52835282de7060e2ffced932da4dba4ba43edfc81b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}