{
  "manageEntity": {
    "action": "Save",
    "entityId": "1280839687",
    "entityType": "Track",
    "nonce": "0x40e8515f8884b5aeecdc70fbddbd0585b8dcdf4af77ab23bf04e0647c43bde01",
    "signature": "0xad5cba14558f95e20879d74a30e36f2dd3a728404ad02b3af2ec78b14863990171aee829ed5f6def3601ce07d1348cf24a09cbe120b5325576d49186fb29f0ec1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}