{
  "manageEntity": {
    "action": "Save",
    "entityId": "1501966363",
    "entityType": "Track",
    "nonce": "0x60e9fa4460a7d16042e139fd62a4a919eb9beb14d9c1e1c8911bbf568f0f7c4b",
    "signature": "0x1833054a335fc8d2e042343021ef8f87c8df954187974664b4f73abda05de86c5ba2ebf7970a78de5d126548291770ca124c6598287e4de98549f83096eb2ac31b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}