{
  "manageEntity": {
    "action": "Save",
    "entityId": "380443051",
    "entityType": "Track",
    "nonce": "0xd39f60e1b685ddb0037bf773c5c343b1ce39c4001963843674816fe205dc7885",
    "signature": "0x942b24da382e0babe73cc444be032e17e4462d80179aa57748219e9a1a01b689182b887ff70f78faffc2751261ee5103ec04147b0594f176b6a8dcaa0516a6791b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}