{
  "manageEntity": {
    "action": "Save",
    "entityId": "418071391",
    "entityType": "Track",
    "nonce": "0x8d7828f4e08e26a62c2c7634bc3b40d9202b1819b157903552a87ebc4e0e4b61",
    "signature": "0xa7c30cee03d7aa11d0d9aafcde24e22f361992359b1a1f711a13f4ea01cf05ff55edf828e4513d33c41198f8c569e41fe19b8c02d6ac5462aa76190aa9e3e2351c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}