{
  "manageEntity": {
    "action": "Save",
    "entityId": "378313289",
    "entityType": "Track",
    "nonce": "0x4550b5ee28e98f83d636c4abc56c0b6e919ce9a4a435037a407817060134b105",
    "signature": "0x99472403b44def1929414195fab0e245d802b93fbae798fc359c049a2f40c3f83163a6921fee632cc4fd16484edbfd2845aad1b518ff81e72c1f7a9c45b77c601c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}