{
  "manageEntity": {
    "action": "Save",
    "entityId": "1578996301",
    "entityType": "Track",
    "nonce": "0x746e8812b36364312e4ea36eacdd8994385e4ec74769876e433e9197b1da1a10",
    "signature": "0x363c212164db77b197290686c09c592d7dfe239cb8d84da871d5e796cb6ccc1d5e3c9dce7fd3412ab0d000d0f8703202d3ef23929353f66d46cd45d2b46bc71a1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}