{
  "manageEntity": {
    "action": "Save",
    "entityId": "789931703",
    "entityType": "Track",
    "nonce": "0xa7d32f52e051f9dd83d866357682c50d2eba8a45e27d31867e2cbb075357296f",
    "signature": "0xdcebe726c6872f05ee6aae6983dc21a7197c996a5b3b811f778dc291f1ecc5e1061174d94835371acffc0dcf6ac40d1c533a4d604f05b5b21f735b070cdf5a901b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}