{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951286304",
    "entityType": "Track",
    "nonce": "0x6bcb74a077f2bd56b506cfef8a825350b042d0ff1b09f622b3f58728c66b9e2b",
    "signature": "0x842a5e134510812fca22ed5a34f4bf5a86f2a47ed91faec72904909f9b367cfd6929f0282ac5714ec1d80521a15b78edb90a6b718e9365cca12ff647a85f5c8c1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}