{
  "manageEntity": {
    "action": "Save",
    "entityId": "685733863",
    "entityType": "Track",
    "nonce": "0x6fb4ca8ad05ea69765d10c1a28f58fb4a11cecd1fd08de245ed2daf6fa0c0266",
    "signature": "0x6bed3b86a9134145fa4548773f49aa940586fc96a57e072b2e59a87a4239160633bd50388eb971c862800aa5578549435ba5f216e5f0db7cd0a63ac3d4f38af71b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}