{
  "manageEntity": {
    "action": "Save",
    "entityId": "470307559",
    "entityType": "Track",
    "nonce": "0xb41b9e1a4691706d7cad437fa88c19c2f0ed4f2a242ecfa5ba6d78b4c126d1c2",
    "signature": "0x512ad71d0ae40e0076ee0381697d795adddb2751b96b47c9a411b673f37200c558cb71a1450b6cc9344672c4db7816a373bc737526ca07e147de0c18856a9a551b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}