{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120189607",
    "entityType": "Track",
    "nonce": "0xd60f35c62423432fa57fb38a022325d240ab068874183e42c1d2bc3e388efd21",
    "signature": "0x507bd7c4d61f40720ecdde20edb12b7345eb2d5369ce903e9b14321fb6eb92c95a8bc1cb6e4637c6309641cf5afed9f13a7151e69d59a631ce19f99839d3b3461c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}