{
  "manageEntity": {
    "action": "Save",
    "entityId": "329653297",
    "entityType": "Track",
    "nonce": "0x310085199ecd1e67d5bc1981f4392774a71d3cb185b654b71f25142211b11093",
    "signature": "0xf866c54317c1f761cd2cd081525f12eb15738a695ecd3078deed0dbe47f112541e160f2fb1df1d0feac76074b155dd19b503f87531ddf45f4988f85d69d027341c",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}