{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354993",
    "entityType": "User",
    "nonce": "0x57f388fa071f7f072cd417953e05e65b23503a74ab9b3066faa32a87c80e4a72",
    "signature": "0x55fdd9475889fbbac3821b6ab0a321bc6fc64693dda1510a811d2997343803992d079a6af6a2e3a112ba99454a662e757ed4a76b64fcbf77ed27c60b1117bda41c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}