{
  "manageEntity": {
    "action": "Save",
    "entityId": "1168735114",
    "entityType": "Track",
    "nonce": "0x42bd74b3e7ceb16a57950da78c5ae73bb99ad152a85b09155cd5b4f9dd4e7273",
    "signature": "0x17399fbacfbd6838b12ea30128d0f7ad968ac3c23e5b53672652b30c280c0c9825b5181cf171102e8e77a741b3a06a62ad3d9e775b49ecd1e311bcfc500439801c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}