{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019407",
    "entityType": "Track",
    "nonce": "0xa3abadb596885be88f90025cf544e719bdc9788b52eba7da97598f531a3654e6",
    "signature": "0x7c5f27f41489b236c3e74cf901faf1462f1e983bdebb7eac123f70d1c211ca9555ea0030151ea02294383a8ec745db750a190416589564faa3f089c017cc2da81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}