{
  "manageEntity": {
    "action": "Save",
    "entityId": "501867",
    "entityType": "Track",
    "nonce": "0x1cab911841fbc56035c89fac9d96272a7dc9720a880cd4f85ba42375c51d254b",
    "signature": "0x42150675c1b577f81c099a00c60857a2445ab6dd7697c8bf1888c263efbf3dea14197bd239862e0b8cda166e101081a3bea070110dcc55de365dd8bae3e29fdc1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}