{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "375100550",
    "entityType": "User",
    "nonce": "0x01fef0aa67878ad1827c3477bf4d098fc33d643482da53f5e0d5869cc2b150a2",
    "signature": "0x3df6bbeec662312e1bfb1699ad604a2d8c6550bff89f0425b1e394592e31b9bd525e67f17fc8f997f1c3ccc5b4a699d259cc2d4c71e1f4ce725992a9fda0dab01b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}