{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "575729107",
    "entityType": "User",
    "nonce": "0x3b5787a8135fd5d23a4151757eaae62fb06f3e9e24688f666727c64ae85bb6e1",
    "signature": "0xb2f30a10b7a1a59410ca56a839648d19766aa6bfba6cd8ed7ff6a5a873a2d26f5faf0a3d92a917be926ddeb02a162856f21bedbd15409785e99916dafa74e9a31b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}