{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "608",
    "entityType": "User",
    "nonce": "0x7efc5e6af64881994f8db4a54affff91013be130bd5cb1aae91b8121c3f82aba",
    "signature": "0x04bd6d30eca931041a64dfe58fa92617cabcefa44764d779438d622a29df1c447297f56b9b1dbb2b0c1f44921bfe2bbb564d3e53f4e0b80afeb307d1dd12cc531c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}