{
  "manageEntity": {
    "action": "Save",
    "entityId": "342935075",
    "entityType": "Track",
    "nonce": "0x497ef541443b32c3f8b775429691f0f9819117bf8f1cb0bc2f7caae191f4ff1c",
    "signature": "0x37ae61b8af26bee6a3e56636e2460d0a93b2bb1a3aff1057b0b52a449947943765227a9db028a8846244c1530d5215d0989f1dccf842c8a3044edf381e98ebae1c",
    "signer": "0x019ff76C6e9072A7b7ee22fC684b4B989b8ea3b5",
    "userId": "775276681"
  }
}