{
  "manageEntity": {
    "action": "Save",
    "entityId": "707385527",
    "entityType": "Track",
    "nonce": "0x3d7371fd0932457170f1a445ad359c135816e1361bf39768b4ee335160adec3f",
    "signature": "0x1241b792d17d22ee80a92e8e6e1956302b8dd62c14b865c7faa3db5852e838eb0615ba6f3feb1dc6adf72c10abe98865634503ae020077e4b17eb68960e7030f1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}