{
  "manageEntity": {
    "action": "Save",
    "entityId": "883351961",
    "entityType": "Track",
    "nonce": "0xb7a10dc798e9004b0070df4b4d80b9240e3826bfc6e7261a9619eb42c82ca031",
    "signature": "0x4ec3f2b17c00c9db40b619f4bc0b87ff1456054773568d4e21c36be8924a0b2f7904fd76b7881e8b9ed301c6033972bd55c97c496893302e9cd48d5ed65ca8cd1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}