{
  "manageEntity": {
    "action": "Save",
    "entityId": "161008643",
    "entityType": "Track",
    "nonce": "0xc249b7b38d83f1ca03e8bd210ab90b036a9c286b8e095f45c2e22d6e17c3bd7c",
    "signature": "0x9e1864ae2b8d20b8dba988601b6e2b910147467112f0e2fcda9cb1d1abc3273c58503c506197885411820002d3569bb01f6760e9b916a231858a0d9a8c4f11e91b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}