{
  "manageEntity": {
    "action": "Save",
    "entityId": "391927662",
    "entityType": "Track",
    "nonce": "0x089ee10b3ecf9c4762865fc194dc9947eaf270ec7e39ac18f28d508020b545cc",
    "signature": "0x280cfc09e4dd1d3013d591328a4c3a150822bdfe63a2f7d06631da3ad1bfb29d2fe51f3a8567f1b0b098648aff9abab4840e96456fc3a65b92e67c16b81754821c",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}