{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1512820",
    "entityType": "User",
    "nonce": "0xaceed505070137dfd186afd2147b4b89df3e0ce13206e8661fbc618f70149f87",
    "signature": "0x58dabd3f3f5a70755fff8c24a0db25c05a64c9808716545e2650aafd944d69f615696a2b3dd0cc4642d01f0b2c080ad3383b652c3cea76108247e2a02e0a00ba1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}