{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459523586",
    "entityType": "Track",
    "nonce": "0xda8f347541cae9b7945c60071fa211c111bc33a023a1db02e342349545271bf7",
    "signature": "0xafbdbc983c6904e7367cb1f8160832abf1f3c1f6e04c97edc3b5d164016c22403ce8490e5e713a0cc1f215fec2ae63387e45f67ac167c6251eed135e9751bfd51b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}