{
  "manageEntity": {
    "action": "Save",
    "entityId": "1343711863",
    "entityType": "Track",
    "nonce": "0xfa333fbaf7b7d780688953a392f83d63e30cba478715ec33063c41155dd36e4c",
    "signature": "0xc7fa78911ab6577ed7cd912fdfc8c2365fd14eb5cd609414c3fa8262f739783668eb784f49a0899aaf988e54404466ea66eb884e92ece53f9a5138b0fc22554a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}