{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "258474",
    "entityType": "User",
    "nonce": "0x51605792d4a53cfb443890e5c2570ab7f1555c828627967045d7e0b360b35c6a",
    "signature": "0xa4962e067fe3b25b7b5bce0d7f0cd583a7b9a392c14d74394cdb39dd33a3fa5e24acf46e983a8cb46de10b83635bd41469c6d4faf114a0fb4d4496f612526e7c1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}