{
  "manageEntity": {
    "action": "Save",
    "entityId": "351439121",
    "entityType": "Track",
    "nonce": "0x0941b1b81375a22190ffa8a12af4f823eefe6ef65ecbe8bf3dce440dec0f9185",
    "signature": "0xd46a6d13a6ee3b1a8278096dd281cc9aa3c58d0c377713b2f47e9b2b24cc205d4a2815e3d876e8133388c9b0f8b903cca0fee5e17d56bb0c9782a55020860cfb1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}