{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xf3572eab2ff813c1add9bb8fa901264986e71f38038ed595c26f3b1fa0273eec",
    "signature": "0x2c15448271884fc35d8bf47ec72c86d5562d8a5b7e9ddd6618328fefcd10958d52a18d08f3e576f56d03767f50638f3ceecfd6f0f56868a141cdff0d77fe88791c",
    "signer": "0x61d5f943Ff590F4D8d843bd8E5d34816513DE0De",
    "userId": "500234778"
  }
}