{
  "manageEntity": {
    "action": "Save",
    "entityId": "1327294809",
    "entityType": "Track",
    "nonce": "0xc23db938af0c3bd9a30fe376303d31a5302042222e1de208f6ef31ac6628b5cd",
    "signature": "0xde981a5494d09563c2723a1c7061afe1c322e3cd458cc506f9869d894a7a50e75e3a55a428d6b47e146853743ab7250cf9a33a4357dc87987d486a81bbf42f9b1b",
    "signer": "0x4A3D09CdfD42dE4C57dc67B09a40B5d9172bD69f",
    "userId": "787102835"
  }
}