{
  "manageEntity": {
    "action": "Save",
    "entityId": "550455795",
    "entityType": "Track",
    "nonce": "0x96acfd35f0acc287b9eceef1a467bb61a442c6db197683bde29fc7eeca81ca2f",
    "signature": "0x0a45f367e2f67b58263bf034a5bd555cd201ac33ae03268cfbfef6fdd51d37e67e5840625bb380bdf59bf25d81bb914909b49157b7b14921a7a0e5ac1bc006951b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}