{
  "manageEntity": {
    "action": "Save",
    "entityId": "847838146",
    "entityType": "Track",
    "nonce": "0x66f005ce9aa7cf38ef4d202cdbecb93f6feb6587ffc6bb8d2cbd15ed7a8eef57",
    "signature": "0xa1b23c19f1f130900c57ae680fc69d1f4dc029f846d2b0ae1d693d92245d4ed42eaae94e27408eb1ae936e5378783f89191f2a0ea7171b745e8dc3fa8110c8321c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}