{
  "manageEntity": {
    "action": "Save",
    "entityId": "516085656",
    "entityType": "Track",
    "nonce": "0xf9278d7ba8b00b1747154cdf44cd7d1d4bafee0fd96c86709c59bb6f854fba65",
    "signature": "0x5f3f2805aa9ab7f6d5d2d285e86d84cec689938fb3ab0bd03b6d2432415c32706bef93115aedaba8d826d97035edf544f8d044d43e3e79ff48ae138b1a576f201b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}