{
  "manageEntity": {
    "action": "Save",
    "entityId": "321328982",
    "entityType": "Track",
    "nonce": "0x67839af1f2378aa8255f7747c78367ecd575a9363755896ac9e41544d719e370",
    "signature": "0x6ce632ba344287eafeb61df9c466308eb9578864b323a4fb0fc84c41a34285fe468de5647f633991884b0687ec75f98aafaca9f57f170729445dfd7b8db3fc481c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}