{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0x068ed4dc64393bb08fdc8d2324e6682ea44cd4359d1470de3b7dfe3f42b4353f",
    "signature": "0x60139d865698ad83041ae4d9ab137b2d68895400e071293b1f2dfdacc5b0278946224b685165ac6fe9bae53c52d71108e709fba14243b7b45ecc1d98ef7f32771b",
    "signer": "0x4d6701aee41cF386F0f1Dc360F47F200983c6c62",
    "userId": "454478631"
  }
}