{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9cc304ac028dc034b8e68c4c3401e9b3cf9e3d9c0fdea4363a4393b495eb56c9",
    "signature": "0x8dcf934fdbafbe9cc2387bfe5c3b8d15d363b68e1e3c50ee95b3e1d443b3cca2186217b8de1ae7426bcaa79add3af8d26c579d3dce48c3e64c0fac00740d11891c",
    "signer": "0xC9271b33ed13b4B466C336f6Ad72bA237B80A8Ef",
    "userId": "487419102"
  }
}