{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262322467",
    "entityType": "Track",
    "nonce": "0x066c200e155f8e8409691e0507cc529728903aca5e91e6ee2198f593e996c62d",
    "signature": "0xa7484165cb85a612e5651e05a1587fd21225f542cfd5bc3d7003a829f8c8d87c431a8b1077356dedf82d9b630525a0b4fbd752f002c1ddac9c50c34f707283931c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}