{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525062614",
    "entityType": "Track",
    "nonce": "0xa996bd381b7a5dfc875ab32f9deedfae40dc6db10f46596ef6128d395bb7ef64",
    "signature": "0x72659c498ce2ec5aaaf41720030077f828c90d31ee12301ff816c0c77f6ce0044e7697670fe41fdf78f557ea672241e219db217939253f42b0385ffca2c66d031c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}