{
  "manageEntity": {
    "action": "Save",
    "entityId": "676214",
    "entityType": "Track",
    "nonce": "0xf007c53ab71dae777ea61f5783cf2f09c709705c8a2156b95d0f121eb85cf35d",
    "signature": "0x27c01d125bbd7fc66db5b354ec34a1d809851bd44008b9553fa2d387722547180c9cab0c697ea67ca3418496225211144c5ace38ab4f049626c0207f70bb58631c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}