{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x584a12575ab32e29d418f61c556c9ac5c44447baa4a946fafda476ed1631020f",
    "signature": "0xddd864363fd65efcab60026ff8d0306f36d4250507ba564baacd346ef4261f357240aa64b760c717fe7beb0471bb5fc94e478887bf32f60bbcb77a9ce57400e51b",
    "signer": "0x930d6F9Ac58B5a72c3c68840A9dE44Ecc8B58a83",
    "userId": "756614075"
  }
}