{
  "manageEntity": {
    "action": "Save",
    "entityId": "1550581938",
    "entityType": "Track",
    "nonce": "0x68f4296277893f9f1a0520c5509ddc1608d1818a7f60fdec26753f98e7377ea3",
    "signature": "0x8304e9eba46f9508ea3ce875c20df2d9917aee216e7eb5ef10aef3b1e9de85610be6313b4641120cf599701d7579314f24e4eab599d32c1103319c0defbd9dbe1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}