{
  "manageEntity": {
    "action": "Save",
    "entityId": "701030",
    "entityType": "Track",
    "nonce": "0xc8ee3e2913587dff67682d3b98620820db0086124cfa7f677f17b2ba8385e707",
    "signature": "0xa553e643ff04255d06f32f0b62c1c1367cd95c88381382da2cf6e1d51bb3e58e2980221fcb1530a9c40e6a513adda6003486dd989b1ceadc254dee8746c607161b",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}