{
  "manageEntity": {
    "action": "Save",
    "entityId": "708604",
    "entityType": "Track",
    "nonce": "0x05f279b8a9bb33e25f3aaba3e3f308fd70b3b9bccea1e75b619485589016556c",
    "signature": "0x011f59d677f346bcc61f91b44789c70c9cdee6ca0666069688f1a4b68824324d4701421e6318c3c1b8649bae450ee802c03aa951e263c3d1d68739f3af499ec21b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}