{
  "manageEntity": {
    "action": "Save",
    "entityId": "686353",
    "entityType": "Track",
    "nonce": "0x0828191037282bc0e7cf6e0a3cda7b9fa479f5397286b9c6c26da4ca8e520480",
    "signature": "0x2d1e936347530047372f2cab4149663b2f28bda66df9b422de2d71a5eb374cef6f32fe998e9937f655468b91a67150dfdd9324880d7b6b17dca04665a8e163161c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}