{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177094289",
    "entityType": "Track",
    "nonce": "0x9fe6ba43f2de19729c62b0785e338d20b61441126cb36ad56ee318ae7b5193c4",
    "signature": "0x6dc1bf91db496be86ad64ac381bfa571462651406dc0960c7178a0461b010ddc7e5a2fa78f82227d4139b51d822827a2a1d1aade4b057e45442ab62c6282a0481c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}