{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "672",
    "entityType": "User",
    "nonce": "0x57cd978cb760a30e63c8a305a1667cd242ff8be8a9ff1ca901c7b619d151c721",
    "signature": "0xbd2fcc4f9031397df4f3caaf38941e3d136853f1295f80860e079693a91f5b532048c10c9c38c37e91cab227b316417730d3dccfd9b110e5b17e92241c6774a61c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}