{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "456716469",
    "entityType": "User",
    "nonce": "0x23c2d38de73eaabf35a1f060bdfc0101e34e0cc5d44dd71400b28282b7172328",
    "signature": "0x9d9ff1cf154feae47396c699271bcf3d0722c016929461ce25edc50ac16fac4558d2d777d2e7eb4131d8c01894fc609c1e69714ebb87650c2cc77a7c446bb4121c",
    "signer": "0x378543D1f467aD15E6688fa37eFF55939dFEDFc2",
    "userId": "200959284"
  }
}