{
  "manageEntity": {
    "action": "Save",
    "entityId": "1688707015",
    "entityType": "Track",
    "nonce": "0xa6dc4b7b69c8f0098819b7748da3d51af0a84610d594d6105db2d3142bfb0b75",
    "signature": "0xfbae19ed7deb2cb934ce54a4bcf965e84ee67a47d6729e0ac2ae6a3f61e198786e0303787c33b777e49730b6a7ca54ece8d347105376e2b948a0c810a5c61f6b1c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}