{
  "manageEntity": {
    "action": "Save",
    "entityId": "62863",
    "entityType": "Track",
    "nonce": "0x442c97a7e2c3f91940ab281e0f12218d37fab8ddea8b2a776761ca13fcbed338",
    "signature": "0xea61ea786123fbfed393513067b35b163cc16e67d2626cec7a450bb46b1e464b06013820ff25b7746f7adfbfcc4222e500007ae56008f4bf5a36890be970879a1c",
    "signer": "0xC4F1D4AD65Aec4aa16A50FcbF32a9c685a22cf01",
    "userId": "551975061"
  }
}