{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xf21c57918c6dad6f4d433575e7a18ac1f6689ad1c31ca5e4d9206c346d687406",
    "signature": "0x8084b8c4a074185119966068b28b4baae686ea42acd209f82c7f816e66e4cba04c5a87dbed7abf618e10ee75dba196a3cab3aa0aed164668d197a03ce98c81201c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}