{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "19891649",
    "entityType": "User",
    "nonce": "0x9dd5d909595cb14519fb80f1e7d089eb50a3318795cfb827378158e9c039adff",
    "signature": "0xc9eefd81b7058304903031157d846fc91b21070fe849c8b920bcb4155be67310031d9ae67270beced7f5884eef642b9da60d7f6926bc1746887e73e54d4b1d2b1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}