{
  "manageEntity": {
    "action": "Save",
    "entityId": "136362210",
    "entityType": "Track",
    "nonce": "0xb86dc0092c7f493f61de08619f93ef710d6f9a223509c7ba8f67cfe30baa1567",
    "signature": "0xf4e1c3fa33a1db93805381f3ba8205549d6b1c01eb46521ab499ba85e566729d1bf04896be8d8266aab57e73961dcd0588d9d3699c758f1e6f0c49548f82c3cf1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}