{
  "manageEntity": {
    "action": "Save",
    "entityId": "147553812",
    "entityType": "Track",
    "nonce": "1792352717162830353",
    "signature": "0xecac6febef54bbc79118d6dda801c403ea0a5ac8d1df0bea149b63c257c451fa2b00b9d5fea986659003950b89eb668944a2e23dffb2da4ef83f1f0fe85dddd31c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}