{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892405197",
    "entityType": "Track",
    "nonce": "0xba3f2b2868c097c1a5f6a0a7e7157c308a0b7f83f5167e8266e0bc188c3443c9",
    "signature": "0x7e36ccaee166c1fc33971f7282216517b41309a1b78780e51aefa0e7ae03ea9e0d1486095d37e12dc8b7405784f8eeeb9310ba982a9bdad9dc94207483f3b3031b",
    "signer": "0x115aD6b177e9267f9364d9849cF82e6bC8Eb2f22",
    "userId": "212145512"
  }
}