{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922576399",
    "entityType": "Track",
    "nonce": "0x7ddb84bef7e83b2e722dc563853539cb96251362f6fab5ce46994aeccb71bd5a",
    "signature": "0x1d198e941828a707ddf8ec04b53edcb528864f4d6e5c7abdaa16bd8fef25fabc0261f6baae1aada2ed8f88191775fac0320e84cf2d4940f766cc4f37a24f522c1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}