{
  "manageEntity": {
    "action": "Save",
    "entityId": "198756930",
    "entityType": "Track",
    "nonce": "0x6dc5eee835230091acb965ddf93a39155fd806a493ce50dacd3607e70ad69216",
    "signature": "0x3cab05a95a86a3ee9a9843be621e5deb8d360fd1d24e1678dd5befe255ec281e2a44f3ebec0b888f23c21d9b2ff625740e322a36a2d130c2871c8b5b29d00de81b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}