{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4967c0ec3575b3aac645185e1c0f9f8bc72aade10c00752976903ea80a4b0683",
    "signature": "0x91854803998570a9ee220d5301afabef8a84f180e40006570e22ced5311a4d4263771e0e1c4c94c6034a43ef7c2a168ccd597eadb6f90e311b17391017ef05a01c",
    "signer": "0xA3A9C3571C6054DD35EDD94b9B2473dD839de8c4",
    "userId": "527219039"
  }
}