{
  "manageEntity": {
    "action": "Save",
    "entityId": "211439",
    "entityType": "Track",
    "nonce": "0xee1465747c3010281557661e1e8761c340e53887915b688f77193396d0e020c0",
    "signature": "0x93cb917f32e7239b576a147e8118a2665536926c3107ad68b5b8dc8b03c1384926f4f7f7cee92487c316dc608b22aaf07944a16f6ae35ab10b393ea88fd5ecf41c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}