{
  "manageEntity": {
    "action": "Save",
    "entityId": "978931738",
    "entityType": "Track",
    "nonce": "0xca5b4d24f82d4774d2537503c08376f6c8364c364e6f82f7854b8bf91dd0ba24",
    "signature": "0x2f3456197da2f312c6e744723c00022e6c3562bb8e6237d981d5a666dbb810a6231ebc9125ead6b2a58b439fc5d5c170b13f6072157bd69cc2996b53c1ce96621c",
    "signer": "0x92328BFDeD38C9a9De6E253A0CF5CB46A3B28611",
    "userId": "831117417"
  }
}