{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "423422344",
    "entityType": "User",
    "nonce": "0xc362c20037d44d81fb6bf3f0546c980c8b24383936a59ed91222de4ec8422813",
    "signature": "0x37e7c35398191757407fc4c5d6a93508bff304b9620e5b37be6f0daed48182b17331cf42a5deebef64338981ab7b0522bdca6f50e512ee48247a81b90489c98c1b",
    "signer": "0x8238ad57BCE4834C1129e35B137aCF58C2406fFa",
    "userId": "574348213"
  }
}