{
  "manageEntity": {
    "action": "Save",
    "entityId": "45779425",
    "entityType": "Track",
    "nonce": "0x9afc2d7a9fc54bdd983684a147653c10a512c0ae4aeb5d9169fbd471361828f0",
    "signature": "0xc87cbf955788891fa0be11b5975aea4ee42f28e7be451b6c3fcbb660d60eeae7332cd511b7263cd623f5b364589eb1abfe5e7c09e3048d7bd1f7968e8d1cee001c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}