{
  "manageEntity": {
    "action": "Save",
    "entityId": "1973751375",
    "entityType": "Track",
    "nonce": "0x0828ff782468fd0ef3ab964313ceb348c95910882e1ec843171789925a947865",
    "signature": "0xf501e13effeae62b68718da21e3accfc99210bf9e1a0f36d218d848933329e966a82e45800e863a463139ad62d077cc0f0504c83f4d9a04bf7e2316a498148ae1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}