{
  "manageEntity": {
    "action": "Save",
    "entityId": "1762391052",
    "entityType": "Track",
    "nonce": "0xefadb12da86217a66c1bc193175dd9687a9e778e6f11558af3661080a32e5d53",
    "signature": "0xa41ceedb2d38f6ada0d0f5134a949a3c97c142e8aedf7229f7754d5991534cf64f70d2edd866ae9e5a97b410f15277c767b0dc10e9a2f2537542fb31570ad6da1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}