{
  "manageEntity": {
    "action": "Save",
    "entityId": "1752520439",
    "entityType": "Track",
    "nonce": "0xad23efe4f3df509ccaf44ec880ef8f3b15d3a530ccc9d75360823b64a5927b6e",
    "signature": "0x440892268cf6f2b9b52e587fd1a9fe53f2ebec80ec2feb1276de8d1dfc608ca16f7583f59c5c67042a36b9e28eea4d911bb55265bf7e4972909c4ad75aabeda41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}