{
  "manageEntity": {
    "action": "Save",
    "entityId": "943747325",
    "entityType": "Track",
    "nonce": "0x02debe8bd9195cd07dc6f819d316222f4ee19e0b7a5a5cbff8d855c010850d0d",
    "signature": "0x7e16c3090f578eec68ed197ab3f3c3009de0bd8c1763d2277f467866e385437011cee6cca717a3b8e5c377b83b2741ca3a0bb5fd5896ce6bff88542fc900d3771c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}