{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054460943",
    "entityType": "Track",
    "nonce": "0x18e021b136926ba45f566520b008688e420e7a66df69687939e99be84f0577ce",
    "signature": "0xb1643918171e2e0428738bad5c4f43487a4aab3bb60138f3d096335e7534998638f9d0ff352e2dec68c653b4165f707bf37b702f0ef0285aa741acd83ff0c1481c",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}