{
  "manageEntity": {
    "action": "Save",
    "entityId": "836449603",
    "entityType": "Track",
    "nonce": "0x44dd670fed0725a49ecebb7de55554e9cd4f57fd7b0fea53f0437339543e13a2",
    "signature": "0xe4cc300f006f1b27a39020e305044a4868081f8b0b911932b31b9ba5de984c083179e1ed247e2a8a27d47acb6616acb8799fc6179458434f37db8721ba6b0ecd1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}