{
  "manageEntity": {
    "action": "Save",
    "entityId": "418737",
    "entityType": "Track",
    "nonce": "0xe909b8eca2c23b18eb1ae2d16bcf869d84cc14b11708252fe7021cd753b8a7b2",
    "signature": "0xecd864adce7c8dc625ec0452ab19e3e9716f602a1a4569ae21f4053ecc05fa4318ac08adf5f42d022368b49625be279e2622ce04e0b54ebb38434718fadec1151c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}