{
  "manageEntity": {
    "action": "Save",
    "entityId": "988515",
    "entityType": "Track",
    "nonce": "0xd0f14058a96ecd95b09eb24d8d5a426f3803418db8ce6305f21ffd557471dfe6",
    "signature": "0x0bbbff32c50c8b322c62d66536971b60bef4de2c29094bb8cde424031a1ef0dc392c276a2cb77ae080ecdcad0c78d5a129bde46956227cef607be5749e20d6341b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}