{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "664911",
    "entityType": "User",
    "nonce": "0x60bfb899103d516b3922f1a7603ca6f27d0da2385b81019505bf9633a0c7eb19",
    "signature": "0x831dad54f6e1cee2d3b6f9bf7f9a87824184d5a43551132b0576afe7e659d1f366178f127f077470fdd8c20181c073b5fee236f1c1fa743979b9b1f925a2a2431c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}