{
  "manageEntity": {
    "action": "Save",
    "entityId": "58660463",
    "entityType": "Track",
    "nonce": "0x62698fb13b53a767afa725bd6b5119d2cdde04b97221d040b961d206ff5c8f7d",
    "signature": "0x822fde35743ce1cb707953ecdad8f3a9126e618ab56e25d92674eeac39bd468f6dec655f6c089fd88fe6381d9bb2a1934f187951e4748aff95e317910f21ec211c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}