{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906823505",
    "entityType": "Track",
    "nonce": "0x8d05cb161c262c8378ef596c02f96d7ac55f81964c6e74ecbe1702a5e743b083",
    "signature": "0x861b10e168b96c8968145c89647924ebaa7d3de47c59e950626afa7d25c4fc5410dd1cf0547b99a52cfa8090b520a517dfe38570d34bcdae8a65b2b2d7c044a51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}