{
  "manageEntity": {
    "action": "Save",
    "entityId": "916447506",
    "entityType": "Track",
    "nonce": "0xec0220980b5d610cb30e3b23f3db52fefaed3d5615ee4334be76097d56ba112c",
    "signature": "0x452c04fa95a0ffaaa39bb0485a210bdda0f60b15dffb1ed0cefd3f91f497537c19587bfb8a02addbb83295c2164d7ef80e9bc46ca5d23207a5d1306692839aaa1b",
    "signer": "0x3EC8c7F4Fec5D21Be724bB4D43502e44e018690F",
    "userId": "53828"
  }
}