{
  "manageEntity": {
    "action": "Save",
    "entityId": "1611673664",
    "entityType": "Track",
    "nonce": "0x7309da4b905f50ef8aa9e1d75be6373c441c0d52acb1a964c9183ba255bd9dd0",
    "signature": "0xb0528f9d639ce44e1d947d123cced4d651c40a21140491b7b935d4e26b06d38d067850bae7d1792e35f6cc8523dfe95f357c599f5b8deb15b719c3d30bf232d71c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}