{
  "manageEntity": {
    "action": "Save",
    "entityId": "293219430",
    "entityType": "Track",
    "nonce": "0x669317008e8fcb3f1ef7b8c0d8ea3df002558b3ced4909f167b9f7dc3ce01a03",
    "signature": "0x2ebd59053d036b0d15f03b3f614d6bdfcc707563b6bd3a2f3ef6c3a46a78146653082b0e552f79d79e3158243fcd2602025b1048257f87f7ecbcbe697ca1d3d31b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}