{
  "manageEntity": {
    "action": "Save",
    "entityId": "462959391",
    "entityType": "Track",
    "nonce": "0xea2890894c00d87a289a3d45bb02d0245fd7ca1d8c0901c150f9bc91b2150205",
    "signature": "0xdf66fc947e0ede563994e402e820cfd7881f3df0d6936f6f8ba821b26865f7634f53a2ca5fdbca1fc48f48dbd75ab4c707a21ce0ea06265e86395673fd9685171c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}