{
  "manageEntity": {
    "action": "Save",
    "entityId": "1495360439",
    "entityType": "Track",
    "nonce": "0xcb76a2b6c3726b68a15b08956cc0bac63322eb49b77b6857c853dfae3c062786",
    "signature": "0xf51d76019e53831dd002f5baf10cd4047f47ea296c9ffa7fc7804dc8e1b6d46e0ea752e30d734648f4cd8b2bac96a275e13aa99b58c7d2eb27a989708b0ff0201c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}