{
  "manageEntity": {
    "action": "Save",
    "entityId": "1496875286",
    "entityType": "Track",
    "nonce": "0x990f33ce3b8114094aaa832da98a97bb4d6877a6b5cfc765b494ae5d886097ba",
    "signature": "0xc7e2510469621528f3eb10ed1b281e1d935f7d0e72ab6585af4099cd119fcb170cc11f2a19da5b88e4b8ae6da1d28349eaedeeb29885abb182da1b6c7c2d24231c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}