{
  "manageEntity": {
    "action": "Save",
    "entityId": "1404423372",
    "entityType": "Track",
    "nonce": "0x847bead55a6a997251755218050622b4abfc7b2236dfde233f34ca8e8502670a",
    "signature": "0x946b6256b5d236c36ab3ec2c9f797d10aef1479588151ed39c20a0df05e1381f19a71244f053dedbd3fdac5d6bbbd9c539ad347e695554b1831829142a52324a1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}