{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1873428",
    "entityType": "User",
    "nonce": "0x68fbd3d34ce30392226dacb7d5c491840f8a444f676a791a665993ab1bb47c52",
    "signature": "0x4e71550b53c6a5606c5805b9e6c596551287a399bba88b17c8bf3411cb3b07c12c4a01cbe1f8d9330190300544d64c78f83e718712d8f4f3fcffdd2de01f81a51c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}