{
  "manageEntity": {
    "action": "Save",
    "entityId": "1287455792",
    "entityType": "Track",
    "nonce": "0x7db0ffe4f22ef58eef68e6ccb2e25b5a9d94b5bef95d870cb1e7d3f63c740cc9",
    "signature": "0xa8511faa37cdf4d92009b14fd22c0e0f981cc1d03a4746c13a8e113ce67f18094e9283c0d36af11fba83e78c157655e62e000ed8615445b9e0c73c9dcea535951b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}