{
  "manageEntity": {
    "action": "Save",
    "entityId": "472534689",
    "entityType": "Track",
    "nonce": "0xeddcce7f7505edf373f4f61004f108a395ef6d61c9371cc340a5c63ec0aceb1d",
    "signature": "0x61f469ba5a56365ee8b6603eda9c524968c4b73122bb5041c96b4caa791d068c2193d61429872345a0e835eb5b6e24101ac41c2fcaebf787d20403cf596dd1691c",
    "signer": "0xc732abD40749026D35a8f4162a803dAAf665371e",
    "userId": "496394700"
  }
}