{
  "manageEntity": {
    "action": "Save",
    "entityId": "2044089237",
    "entityType": "Track",
    "nonce": "0xf5faa8272fc12e077c912e95f66713e5f4b83c0ab4d6bacb3423998f9d9ed010",
    "signature": "0x518f56527416344dcce0590213f1f54314ed304626875dec1a4640e7fd4dc5e51864cbc58a4dae6f979772a48dbccd0053354caee27f8f2dd09df5e738bfc4621c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}