{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc5420f54a94e3a82e511287aa3840e75711227d28f00727c48760e4ec1a63adf",
    "signature": "0xb7a2cd541fcdf9e6abef8c2796fbff0332088b0a175c1f9b46d04a2d1853e4592423261faccfa8eef62d580511a8bde34a0a0731d23467b786b96fa1f10580051b",
    "signer": "0x224289C4a3adaCE8E3610CaCB4fFc13c619535F4",
    "userId": "966244701"
  }
}