{
  "manageEntity": {
    "action": "Save",
    "entityId": "267127165",
    "entityType": "Track",
    "nonce": "0x02a7c2208659c9858838e884bad822d10d42b6ee09923cd0316d4d94b7da303f",
    "signature": "0xb4a926f5eed0e4fb2d42770d55ceac76024143da4da2036b032aa687e5dd354c6cfdd0331e5aadb73e0ca41a0fe3f8b976abf636e0dc43671a6f341acbd837f51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}