{
  "manageEntity": {
    "action": "Save",
    "entityId": "1989286448",
    "entityType": "Track",
    "nonce": "0x3625d74ad5cb852d22f50341d15e4778adf94cd70278cd1acd8f3cc7268fa4b8",
    "signature": "0x04186b417523ecdaf704eba7d7b20c4a01cf9c5eca78c36ecbb186c071c2b99f083d713dd02546a02735e7893dec57cc3da444cb68723c737bdb46f88d73457f1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}