{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216634812",
    "entityType": "Track",
    "nonce": "0x9b97d54bb609911d1a523fed19764ba336f2f65af3c99740620c8cb950993b4e",
    "signature": "0x50c57de1bb0f87bba2fe1b2219e87332968b94af9f5682362da5974f4aa5948e4ee40fd3348838bae64a03fc4cd9c93142b9571f5f676efe8faf851b4f0223f21c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}