{
  "manageEntity": {
    "action": "Save",
    "entityId": "1301427938",
    "entityType": "Track",
    "nonce": "0xfa420593246562861d730b0b08f40a6c3f00d93f36e3ce16046bee3786c92299",
    "signature": "0x8338ee6ff0045e1f8deac15505fd45bc2aff0285223e225adfb4f73b3d71bf581016b5bc33b9a82bcce4dd811046454c13b6b7e20732cbbd8dc3aa2f571405e01c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}