{
  "manageEntity": {
    "action": "Save",
    "entityId": "735303157",
    "entityType": "Track",
    "nonce": "0xf0bf75ce5fd199018905736688795187ae376f03927bde0136d62a1c41c52242",
    "signature": "0x9f3760c3f86f46c6971f7a2c5a50722d01c431232ebea0ebbe6ef5a45b17de0442e2d5150818445e8cd9e7884d6128d77155b987826540f320dbc3f304838d231c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}