{
  "manageEntity": {
    "action": "Save",
    "entityId": "1428627535",
    "entityType": "Track",
    "nonce": "0x3e793d9545fc1cdb9f960de89e82947cc7d54aeaa8bcf9f1c7c538ea4fdd5194",
    "signature": "0x8a0e27c0a406b876750da6d2f0e516fee5a867c48e38622833e5b8653a9360760ca1802fa2e9bb87049974b9528c7859f154cadbfeb6f5eca8e0b1c6d22fdd0a1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}