{
  "manageEntity": {
    "action": "Save",
    "entityId": "1881389628",
    "entityType": "Track",
    "nonce": "0x4e036355e63a15df55ccf7ec4757d40b447c8285bf696e093f91dc118cada6bf",
    "signature": "0x77499493eb42a09ecb3f68f1a1e29e192de0baa02572c6390bf4456cac2920723bb1e35fc781fe00e0211afd5403ceb66c0711128382c85f38e73d2d738c8f471c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}