{
  "manageEntity": {
    "action": "Save",
    "entityId": "1404085105",
    "entityType": "Track",
    "nonce": "0x2a65c76254151671c3c26a703b26cbd794562f5ef1434d43cf094d98c822ac0a",
    "signature": "0x3375859af14c02042d8cf96eb7ca26435578d2ebf664c72b3dbfb760a1b4d26a407d9e54433a98d9020d46f8a57591ba72166f048f35d59d793def10a903da841b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}