{
  "manageEntity": {
    "action": "Save",
    "entityId": "329566",
    "entityType": "Track",
    "nonce": "0x6ebf766f43bba7ec924caf112c413f8721975d60b8c0602b38bc89042b497a1a",
    "signature": "0x5642522fcd28eb11cacf797d2a90919ea9b3ee0f19771eb31a4ad149e6c4e9a504f41e8522216750173322da8dbd5179d03cbaf99f330e6d46d002b4c75467ad1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}