{
  "manageEntity": {
    "action": "Save",
    "entityId": "1924142210",
    "entityType": "Track",
    "nonce": "0x87e5197fcc910f1229b173cd30e3a3ef6bc0950f89ce82c3367f86a77bf2a19a",
    "signature": "0x4d7fad1c6b5b10dccb484606e129b202b900622509159b1dcb8743cb2a249d1f44ee841c681198b73b5626f5f2d9d2c4d44802d9ec39ee912a58a7103d67598a1b",
    "signer": "0x195d9eE11400245E841C02c4b4288a90A8195e91",
    "userId": "103785872"
  }
}