{
  "manageEntity": {
    "action": "Save",
    "entityId": "689626",
    "entityType": "Track",
    "nonce": "0xcb26afedad690cb0383a6b7bef222c2b79ea1705410608dccb2616bae6657b70",
    "signature": "0x9e6e7044dbc8753c85d37bf72429cf4deca58a8eb7d4f00a1ed0773f73dd015167a070b1fd48e7312cee395ae56d05c7f7fb0cc053c5d3ba6ed20e7d16c007071b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}