{
  "manageEntity": {
    "action": "Save",
    "entityId": "209301",
    "entityType": "Track",
    "nonce": "0x9462e41fa970c070a5bd5fad460b1d302d3b79c68d26ff0a917259379c6bfbab",
    "signature": "0xfcaab851b2696d9bac4abd4f8c5d15943a43ee207b596ea762d5c78c551226477be2533e7e9815db33cd631b0a3edff23fbb04f88a12241fbb5eaf544f97d3581c",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}