{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0x35aed91319ec5bfd436a5966055ced7231b2112f4b4bcb67862c1ec89d9ccb26",
    "signature": "0xa7a88f361f7d53b4c39e7a28b0f5463b8f2b749835d687554e396aaa8af1aa2478a5282e3d39290e9d5bf060839c25c32af2b18315050a1c20357c3728d15e8c1c",
    "signer": "0xC77FC375F0505f98061bDD371Ad3b99D16525d71",
    "userId": "187154748"
  }
}