{
  "manageEntity": {
    "action": "Save",
    "entityId": "503765281",
    "entityType": "Track",
    "nonce": "0xf15c896e1c8f3a1f384037c0cff3d7727100197425e2b35d5a4790512b92e5f8",
    "signature": "0x1e14ebb9be55cbcf1b9c58981909e0fe0091dd0383d31c5e4a435b17d7d807a9626fe23edb1649c2da7703697d43f2f297be4a601640b1e23c9596df6d136a041b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}