{
  "manageEntity": {
    "action": "Save",
    "entityId": "880932117",
    "entityType": "Track",
    "nonce": "0xde7f9a4ed50f0d1d1a375a166f801e150db92a2f5433a3d2c1e96b71f0c6358d",
    "signature": "0x5bf6c85b2927d20f9fa10838d4ca0a18b96423abee4612d4c63457bcd5dc737f62a30a5fced3f37edfb185e9a230d05650316dda7c7439ca371bd65e2f2bf44b1c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}