{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098408500",
    "entityType": "Track",
    "nonce": "0xf7abe1896c8fbff07fe95f4915c3861dea91efcca34ccf8608f648b724b56789",
    "signature": "0x60e9182308425df2bdf0ba7dfe02dffcfc18704c32ae55f63d057ae3b44676d458ec99971e8845f6e1d6154777f64bf56e9aa648a92b9ab9bc161f41bd81711b1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}