{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508547804",
    "entityType": "User",
    "nonce": "0xadcc5d3166be80cfaf1836ebe91845af7e71340b807139de910229638cb312db",
    "signature": "0xcf31dae6d6fc4f0f15dcf43ca2d27f5b60725c64a493d4495c98394543b512e2226820620ef77ed8ad1e7888715bcf2a14399b37633ad6539fadbbd450e649b21c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}