{
  "manageEntity": {
    "action": "Save",
    "entityId": "837310956",
    "entityType": "Track",
    "nonce": "0xac5efb3d18d40df731dd54651ce839f905855d17368bb49953847beec472afa0",
    "signature": "0x16a3ece66e241baf5d011072d319573c1dc5aa35c47289f38f5eecd4e1fc5caf15b30dd3789a25a16d3b08ca619f43afb0bdf4ba508ca4dfc4ad66cdf6c016b61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}