{
  "manageEntity": {
    "action": "Save",
    "entityId": "914280887",
    "entityType": "Track",
    "nonce": "0xa8eaf1876ab666550dbe3d94d373ddb7115decbb754cd509a0a82ed87cc215ce",
    "signature": "0x977161784b77f8b65e0d32f615f3bf60acf2812921964e52e093f7a599054f8b2624fe7efdd564bf2d9f1c3b8e5e54650bf0632e1866c2bb0933b621e062733b1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}