{
  "manageEntity": {
    "action": "Save",
    "entityId": "1657951578",
    "entityType": "Track",
    "nonce": "0x45734dca6fb7b98537ed2758ec7df006bae3dec14f23a572b9a31a70c1924fa0",
    "signature": "0x709eb1a36f64c5e87c8dbc9fc4bb62a31522adc2ca893777ec036215bdb315200f58aef02bca9df42443c74b8e32bcddffa1f6c6c160a7252cfb8a4fa25e79051c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}