{
  "manageEntity": {
    "action": "Save",
    "entityId": "2088293730",
    "entityType": "Track",
    "nonce": "0x0d30166736378d3944524baa88fc223d670d959a9a918f5f9591c13c56bb4fd0",
    "signature": "0x42bfdae6f15a82323df4a4acc616f9a9adb3d94e08123991f96744d97041f98e5e06282d56b3c1f97109b1f1beecb3fa31d5f1e6a1ca8a4021a8ab45f70d3ecf1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}