{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "504",
    "entityType": "User",
    "nonce": "0x608dc7ab966542dd26b1a0dd615162e6edee958dfa7dcb8496cc568694aa8be0",
    "signature": "0x4f665922f2463a8cfc2797b46d811d5ad19795f5aac640156527a02d677071eb5f1b4a50dd7c0260bcff0662a29d9b97c05ecb99ab41cbcbf611c2b5b5eafa3b1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}