{
  "manageEntity": {
    "action": "Save",
    "entityId": "1764322904",
    "entityType": "Track",
    "nonce": "0x562d637c232a49847d3f45f8af4c91cbaa9f4668c534040ecfdb5bdbb027ebfd",
    "signature": "0x5bdc3b05b4029b1c179d43e6820ad7e6da559e15dd0a262966745503676f0ea531bef39e42dfe4e8bc8086d33c287045985e91be3c94019425ee6670c7eddb201b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}