{
  "manageEntity": {
    "action": "Save",
    "entityId": "369474",
    "entityType": "Track",
    "nonce": "0xc28a66897f96f8cac71b53a33450656c6842de82528e202cccb6cc35eb0b7c9a",
    "signature": "0xab2cd9f8bda292f6115aa529d83dd33a11dba4a8b17643c72b7d2deacbbd5b8961167d2482c176739ea61d18f902ea5fcda5e65e10da7f0fc4f942ad053eb4f11c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}