{
  "manageEntity": {
    "action": "Save",
    "entityId": "719792757",
    "entityType": "Track",
    "nonce": "0xd6fa58a7c54811ca9dccd330bc49f2894b3d706bf2db770ca0567fc93823e8e3",
    "signature": "0xf267913702d5471df857a9c9b61477cf37d03c4d97fe7b29b6e5bd6dce96816653f79e1934df97137b58b410cc90674d20099852d0a2604df8eb3935e3df38be1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}