{
  "manageEntity": {
    "action": "Save",
    "entityId": "1681405285",
    "entityType": "Track",
    "nonce": "0x649b440e96130b6b469f30fe045569c3b8d03345352aa66c037aca6b23145b2d",
    "signature": "0x79c5d79f0b58b6e5d21a8989d1bd4d8ad2ca7596c6a60d4e163b12393cfd41cc0a48339ea250690ed97bef9cdd3160dcbd460054a9ac98fec51d01fbe808e6861c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}