{
  "manageEntity": {
    "action": "Save",
    "entityId": "428368",
    "entityType": "Track",
    "nonce": "0x0f915ce3644bcf1e098cf4fbdb0fb8bf0c8ed7b5bdbf468face2ce25937bce74",
    "signature": "0xb7fe8fc9cc8a2a626353d45b036dd43d6c3718cdf82e5b539fdafe333d391658492eb6a489ad79c3b6c355abb42d9d96885c50870df8aa6b08ba7c14747e43181b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}