{
  "manageEntity": {
    "action": "Save",
    "entityId": "578651",
    "entityType": "Track",
    "nonce": "0xf19fe259a6485d3cee4b51ef2d1e35c5d59a3106bcafb6a8efe9c40b4f229f1f",
    "signature": "0x0b3e5fb82b2245e597e6a80173c1a5cc5e2c70cf7aaa545b01b9189d54cafb2f5be32113f7e0b66e96249a5e6e9ab190489cecd2357afefff9b070f8cbf3e80f1b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}