{
  "manageEntity": {
    "action": "Save",
    "entityId": "530932631",
    "entityType": "Track",
    "nonce": "0x7f44485a6c5a0d6c432338625b8f64d38c0ff782bbbc969fbc73c57b08398d19",
    "signature": "0x4b7fac6f8424ca315df8cd9a4f81a2f349bd645e60d0a841a39c6efa405efb703cc0ac5a6b385a23cfbb6171e9802c7e130a58787549ddb248c1441cf166542f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}