{
  "manageEntity": {
    "action": "Save",
    "entityId": "627614",
    "entityType": "Track",
    "nonce": "0x04325d07175286f0b0e80e9e1f2d6977475bdbfff508ec5a8616a3c6b1091296",
    "signature": "0xf87470ac1d9916fbc86de3f2eef463f2ea365c059346f32a3a8b8e1b430e8d655f6082eb21bb705ef9cbea7d4050884021953e6dbe14508f4c6320fa53ffdd731b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}