{
  "manageEntity": {
    "action": "Save",
    "entityId": "201666183",
    "entityType": "Track",
    "nonce": "0x750ca9d5b81ce544a0277727e171a8c3e52c9c51b3392f02606d670f290a607d",
    "signature": "0x8da98de013a961b530c0d516b589793172efa5efe129fc9e3e64d7ae81c971557128f1f2fdc8475683ae8f80c7309c4d4cfa41f4c17d6046de3e5e25ae143e341b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}