{
  "manageEntity": {
    "action": "Save",
    "entityId": "2055231366",
    "entityType": "Track",
    "nonce": "0x3a81dd59ed2cff0e7af4f62fa6b0084c232f557d2fff97f7817c34f4a12b08e0",
    "signature": "0xd363ab8272ef26df7fc80d630e57a70bab1043094fb9c640f6d7bc135aceaff275ad5ff73e3dd1458152a67114da42fc4ca8070e03db8b66daa4113369a64f781c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}