{
  "manageEntity": {
    "action": "Save",
    "entityId": "901871700",
    "entityType": "Track",
    "nonce": "0x9a3ea2b25e2396f5724d20316b67598f2ada3c668b7e88c740f20eced08b6306",
    "signature": "0x98b9f84b7cb459fe25b42456f516cf2157e0b36c70671b82654244ce100f7ff666021908ec22a1b2d27498d89e523f8f88b9e8bea99332e428797a4688cf190c1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}