{
  "manageEntity": {
    "action": "Save",
    "entityId": "812070385",
    "entityType": "Track",
    "nonce": "0x9443cf10b887ebdf1420e8c47c23c29e3da433b5d92145d2254050e7fc367a4e",
    "signature": "0x2e722c875af49e468802fffaa200bbd73351cba0f60f4abab0a1de54c598e37415f839dc687504f16f939391d0aa337a15c7ba57dc065a1fc51cc5b842bbfca21c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}