{
  "manageEntity": {
    "action": "Save",
    "entityId": "55048299",
    "entityType": "Track",
    "nonce": "0x1fcd058475df08cc9540ba96a1e43e9243a444d8b688e0ac20e3d9d400bbfb8e",
    "signature": "0x79dd7e2491a404860f5bd64a8cf53fa78157fa9852d7046b9ba8504f2048687b18d07b955670e3e66eb45646874ec6b8022d4cfd30f6e22d5ecc7095f41d3df01c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}