{
  "manageEntity": {
    "action": "Save",
    "entityId": "994689",
    "entityType": "Track",
    "nonce": "0xf0b6f58537c1174406aba2aed6288d91e26d81bf76cd8aabb47141aa9082f72a",
    "signature": "0xab98f668be29de83f29b2135d15af82ae3f91dd1775845ba86fa647fb64985482b1d8a8f0bf4bb9f6f0bda9fc8ccf46391164a18cd5475d01927c7a7e08a3fa71c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}