{
  "manageEntity": {
    "action": "Save",
    "entityId": "2057595439",
    "entityType": "Track",
    "nonce": "0xdc02e960c0993434b1b5a2afe355649cf5e785ab21deaec5936d26a2f0960ba4",
    "signature": "0x3da89977176c4d1756ce06270c161b8946a3ef4dbe1a4e04ebd92fa6e8c820f7749cd63343ea695914ac56cd39ae1643e4217fb807b945ba65a3b851e431d9181c",
    "signer": "0xcF1BC458908F84936B19Ca8Cf67C751CD647B02b",
    "userId": "310796"
  }
}