{
  "manageEntity": {
    "action": "Save",
    "entityId": "642982928",
    "entityType": "Track",
    "nonce": "0x33d1c7794d13d996430825353c3c9835a543d0f3ecce5dfcb42879854851fe26",
    "signature": "0xeb3e8350eafa1a9cbd10d53b761ed236fcddec0d48239b30015aacab8c35406474166528797eeaa3886c92695f0db00340175af173fd651d76151d4ad14657bc1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}