{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x961332100a5e0b89200e25daf9f9ba9d47d052d9d3c02c52209c62b7cdc57fb7",
    "signature": "0x83337f5c9e8839ba514551664d48017b3515d5cc160ed3f7bdf25bc74be4840d2a9fe06191a1daacb8526159c7efa654c66ecfc7ff7b788b9cf05af3bdf54bdf1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}