{
  "manageEntity": {
    "action": "Save",
    "entityId": "1273342694",
    "entityType": "Track",
    "nonce": "0x67355b0c204b633a3b429995e26085ede784f30835ff9670e0f9f80bdd55b811",
    "signature": "0xaf86756ab07003e98637aba83dd11654d509e4c3d361ccf5ddb79bbab7ba3cc63682ac8548996d413b8d6e6c36f5388204838afc0ec1bdf5e2fc91ef515182411c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}