{
  "manageEntity": {
    "action": "Save",
    "entityId": "1127605",
    "entityType": "Track",
    "nonce": "0x546a1c055cab46c8d8954ecbdabbc35990269625a0aadbfe389af4470454c001",
    "signature": "0xcef49c3456f98fa9bfa6fc42bffc367901c294a323e1b91ad23d6b64ae113abb7aa02cd49a2bb5508e35df1ec7d62c2e86830f3fccddfd36be33920142fb4e521c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}