{
  "manageEntity": {
    "action": "Save",
    "entityId": "355481312",
    "entityType": "Track",
    "nonce": "0xfbe3c68b6e777e27aef56395886ddc3fea74e5bad3753a8dba0174076b5da986",
    "signature": "0xed7899339d77a5109bbfbae2dc2aed759b8ab4af6b1ea52572bbcdf780e18d101ac20808fe7e88ebe53e3ad9590388ddcc82075ccb7ac0f660c79c2aa0a215a91b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}