{
  "manageEntity": {
    "action": "Save",
    "entityId": "655925844",
    "entityType": "Track",
    "nonce": "0xfe5132657506100eae67b0c9c49e66feea992b9fc9e76cd853e1ed183c67da65",
    "signature": "0x7d79456751de6476bcc55be84cea24c01ea124a5f6ae58a7cdfc3a10fdf02a46332d237252ce57b90cb1dc74c08ac692615dd10216eb71b66afc99e01d8141d61c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}