{
  "manageEntity": {
    "action": "Save",
    "entityId": "763382",
    "entityType": "Track",
    "nonce": "0xfc8208f950a8f76e0841260deb45ce5afd4d75ea0fdf806ec35e7632ab7bf4c0",
    "signature": "0xd7219af57633bf18202906f677fab9890c2b8153441a59fc1af0bb8c96b0415700781997a725c743dfbbf578237df0f230f6d7724b39f7467c7f7e4affb0afc31b",
    "signer": "0x0946c54D7Bd95A069DD100F93Ec74b01b6023523",
    "userId": "230796408"
  }
}