{
  "manageEntity": {
    "action": "Save",
    "entityId": "133726620",
    "entityType": "Track",
    "nonce": "0x612cfa8defdf52561cf9128d08317d8ce0dd28d8261750d0cc8bd317b9c03c51",
    "signature": "0x3a43ddb9847c5b9ab2f63f25801d913beb4801539841b8302753b0d3d9c42198519a6c4f7d4a4ef38f2376469dc1356b093fad64c5c428a7299edb050d20fa601c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}