{
  "manageEntity": {
    "action": "Save",
    "entityId": "1234181261",
    "entityType": "Track",
    "nonce": "0x8cfc3788b6fe01d7f32d2877f29dbcc8cf7746ee2ca6d7380edadf54504889f2",
    "signature": "0x888aab149fe9978aae4fae63ff1120a5a8c8e382b008a0ef2d47beedc282bc1b6f0025587894d415ad6398f9f2eefa69db443a3e0e0976f5bc1a7a1f88b29a771b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}