{
  "manageEntity": {
    "action": "Save",
    "entityId": "1206326268",
    "entityType": "Track",
    "nonce": "0x31560fff8f6809418b8f43730bb073fb57e04a8d365509c07d521cfaf184fa99",
    "signature": "0x42c31ab09afac80be5103db7201f8dd823623d7169e7a0f377e0b34436e05f8e325bbb4cfddc68f111b557d8910ee666e418a3743fa5027b0347052159df6f0f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}