{
  "manageEntity": {
    "action": "Save",
    "entityId": "271254",
    "entityType": "Track",
    "nonce": "0x99c987ddd9677f2eb6a68fd3ac196baedd5825a95c1eec67126c8de1532b5bbc",
    "signature": "0x84f8cd5d6594264e4f3b0d3b92cdf1b3a9e89bab8a8e5eb4515f73b7903587917f68b25060d1a8ceaf6b4f79bf553b008e60413b8c2b3d8b4dda993a501ba31d1c",
    "signer": "0xAa942fb8d8E7Eb9024f403fC0FF63D378019Fdb5",
    "userId": "8151"
  }
}