{
  "manageEntity": {
    "action": "Save",
    "entityId": "379219",
    "entityType": "Track",
    "nonce": "0x1391b3945ca3d47fad0a64e705eb1959d608132c6e4fc592100eb866e88fe7f2",
    "signature": "0x94eeff3937b8471949ddd66d31da5455e52678ef362058a2579a7437311dd7186b6a308d3521ac999b6f18cda18e0d96557a912edbaa29b93054eff63baea18f1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}