{
  "manageEntity": {
    "action": "Save",
    "entityId": "1653294274",
    "entityType": "Track",
    "nonce": "0xbb5bceacf6a45e1e5ab37bc568d3b0ba616b48bb502322fc7d4daa32fc1dc2c1",
    "signature": "0xcdf4df1b74e8aff3ff12bcff79ca30f3c493b8f19af530825f64cf8805470bc648dd9910832f0d4c6e6dbce6041ab388720004f80b7fcf9643d25719306ff3ab1b",
    "signer": "0x4810fE66B3A42DA4cb34b622aD9A069C293c6b86",
    "userId": "445042807"
  }
}