{
  "manageEntity": {
    "action": "Save",
    "entityId": "596500728",
    "entityType": "Track",
    "nonce": "0x4a83969acc8e03229261113004194f86614a29391339307eebda09a841b56997",
    "signature": "0x41e3f8f9bdf82fdf826d22ad31c82331d8a9555ed03e41819bf25e897d3d1c4c4e138523679a8b9050e93bf4c1cffdd16a3edc2080cc44f1dac48cb7388a6a241b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}