{
  "manageEntity": {
    "action": "Save",
    "entityId": "313682",
    "entityType": "Track",
    "nonce": "0x8efb5d1885462dd046962f640cfdb8a863bdb62bc1fa76014e603b48eda6c0c0",
    "signature": "0x73009f24eff8ef3f4f5998f74a777d924665392f4c817b54371d9d43ce24b660735f5ad81844163dacca7d63eabd85a064c55c093a7165060ba2efe3442ceb201b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}