{
  "manageEntity": {
    "action": "Save",
    "entityId": "1550524793",
    "entityType": "Track",
    "nonce": "0x825aedc54e5be1b818b07cbae93337088f2654f35487c2e1901a1b47f231071a",
    "signature": "0x23b0af343ab9a0a39f6eb80bf78c90b0d8800f5950a49bf0bf2be65a991182d647c35e1394be8f7716cae81d27e44da2eb1773cc54e0fbd540b29a5af362eb1d1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}