{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x048072a853ed97da6ff042ae97078501e0302e3fe6a44f23f56e61daf74522f8",
    "signature": "0x552745cee04aca2f7d5cc9c515c9c2917c13bacfbda28dd070e17cc4548d94b41306c229dbea51ee096525f9b9e9aaff28bf4d6bd11b110bb497149e70ae9bb81b",
    "signer": "0xEc546C3d3ceA644cc0aA21232940466A1E6780F4",
    "userId": "415001454"
  }
}