{
  "manageEntity": {
    "action": "Save",
    "entityId": "2100085204",
    "entityType": "Track",
    "nonce": "0xc8f0e947cc52f7efb60715a78a671d4cc7ecac3510c81dcf2766ca5cd97bc5d2",
    "signature": "0xb8764f04308bdf83d56310868a2650adbb2b9a952c69988121c9053421dbb34c4fbe6ebfac5aed74371acd461f5eaedbf24974e012fc03a5821b593eec4c1f531b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}