{
  "manageEntity": {
    "action": "Save",
    "entityId": "149526194",
    "entityType": "Track",
    "nonce": "0x9b0ff149cc0b1276decf893661a216e44482cd358d802d2a3abbcb2c933a627b",
    "signature": "0x2904dcf81463bd0ee555243d15b20419f21cc8560ac2031e578adcac3c3dece806b686fb955cc4283f23868bc25a9ecd4dc83c3e53a79a041b1070c6b3bd8efe1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}