{
  "manageEntity": {
    "action": "Save",
    "entityId": "1945174491",
    "entityType": "Track",
    "nonce": "0x0b27bf36cb0e8f4533cb573a650815c5ea007ae421c935b34deeebe5f4c08a50",
    "signature": "0x2697909df56873ed081d4627c9ff59a2d1cb31680e48ada999771fa4cfc9fd2a7f32290b19bb5ccd862c1902760ed53b8b462d9c48f8904921b8ccfe39555aab1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}