{
  "manageEntity": {
    "action": "Save",
    "entityId": "1973357746",
    "entityType": "Track",
    "nonce": "0x322d5f04b1259130c512d6456101b17dc9a2cc3de0437eace1366ce4ee487ea8",
    "signature": "0x69d2ed61510496ed08aedee292e57934ff96458063ef9ef1b2afaa71580580316074219efb83ecbfce8cc6d0df4da6396cb7af4c8685ec14424a8bd692c207ef1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}